摘要:
Apparatus is disclosed for providing auxiliary cooling and thermal stability to a temperature sensitive opto-electronic component. The disclosed apparatus comprising a primary thermal control system having a first thermal connection with a primary structure supporting at least one component of an optical system and a second thermal connection being thermally connected with an external environment; and an auxiliary thermal control system having a first thermal connection being thermally connected with the temperature sensitive opto-electronic component, and the auxiliary thermal control system having a second thermal connection being thermally connected with the primary thermal control system whereby the auxiliary thermal control system provides cooling to the temperature sensitive opto-electronic component and the primary thermal control system provides additional cooling to the auxiliary thermal control system through temperature regulation of the primary structure.
摘要:
An optical connection module attaches an active or passive optical component to a substrate and aligns the optical component with a first laser. The optical connection module includes a fiber submount that is attached to the substrate and that includes a thermally insulating material having a thickness greater than 20 micrometers. The optical component is soldered to the fiber submount using heat from a second laser. A laser submount is attached to the substrate. The first laser is attached to the laser submount. A fiber bonding pad is located between the thermally insulating material and the optical component. The thermally insulating material and the fiber bonding pad promote lateral heat transfer and limit vertical heat transfer to the substrate during soldering. The thermally insulating material can be integrally formed in the substrate by flame hydrolysis or by anodic bonding.
摘要:
A wavelength-variable semiconductor laser includes: a submount; and a semiconductor laser chip being mounted onto the submount and having at least an active layer region and a distributed Bragg reflection region, wherein the semiconductor laser chip is mounted onto the submount in such a manner that an epitaxial growth surface thereof faces the submount and a heat transfer condition of the active layer region is different from a heat transfer condition of the distributed Bragg reflection region. Moreover, an optical integrated device includes at least a semiconductor laser and an optical waveguide device both mounted on a submount, wherein the semiconductor laser is the wavelength-variable semiconductor laser as set forth above.
摘要:
A semiconductor laser apparatus comprises a light-emitting portion including a light-emitting device for outputting a laser beam, a light-receiving element for receiving the laser beam outputted from said light-emitting device, a wavelength monitoring portion including an optical system disposed between said light-emitting device and said light-receiving element, a control portion for controlling the wavelength of the laser beam outputted from said light-emitting device by controlling the temperature of said light-emitting device based on the wavelength of the laser beam detected by said wavelength monitoring portion, an optical isolator disposed on the optical path between said light-emitting device and said wavelength monitoring portion for preventing the light from returning from said wavelength monitoring portion back to said light-emitting device, and a temperature regulating portion for independently controlling the temperatures of said light-emitting portion and wavelength monitoring portion.
摘要:
An optical connection module attaches an active or passive optical component to a substrate and aligns the optical component with a first laser. The optical connection module includes a fiber submount that is attached to the substrate and that includes a thermally insulating material having a thickness greater than 20 micrometers. The optical component is soldered to the fiber submount using heat from a second laser. A laser submount is attached to the substrate. The first laser is attached to the laser submount. A fiber bonding pad is located between the thermally insulating material and the optical component. The thermally insulating material and the fiber bonding pad promote lateral heat transfer and limit vertical heat transfer to the substrate during soldering. The thermally insulating material can be integrally formed in the substrate by flame hydrolysis or by anodic bonding.
摘要:
The present invention relates to a light-emitting module employable in optical communications. A light-emitting module 10 comprises a semiconductor light-emitting device 12, a first mounting member 14, a driving device 16, a second mounting member 18, and a housing 20. The first mounting member 14 mounts the light-emitting device 12. The driving device 16 drives the light-emitting device 12. The second mounting member 18 mounts the driving device 16. The housing 20 accommodates the light-emitting device 12, first mounting member 14, driving device 16, and second mounting member 18. The first mounting member 14 and the second mounting member 18 are disposed apart from each other within the housing 20. Since the mounting members are not directly in contact with each other, the heat generated by the driving device 16 is hard to be transmitted to the light-emitting device 12. Therefore, the light-emitting device 12 is restrained from changing its temperature, whereby its output is stabilized.
摘要:
A semiconductor laser unit includes a semiconductor laser device, a first temperature detector that detects a temperature in the vicinity of the semiconductor laser device, and an electronic cooler that heats or cools the semiconductor laser device. The semiconductor laser unit also includes first and second branching devices for extracting first and second branched lights from an oscillation light outgoing from the semiconductor laser device, a band pass filter that transmits only a light of a predetermined wavelength band among the first branched light, and an optical filter that transmits the second branched light so that a transmission loss is increased or decreased in one way with a change of the wavelength within a wavelength band where the oscillation wavelength of the semiconductor laser device can be changed, to output a second monitor light. The levels of lights which transmit each wavelength are transmitted are detected, respectively, and when the level of light that passes through the band pass filter is increased, a direction of changing the wavelength is detected according to an increase or decrease of the level of light that passes through the optical filter, and the temperature is changed by the electronic cooler to control the wavelength of the semiconductor laser device. Thus, both of the output level and the wavelength of the oscillation light from the semiconductor laser are stabilized.
摘要:
A semiconductor laser source having a laser diode and a fiber Bragg grating is described. The laser diode has first and second facets from which output light is emitted. A first end of the fiber Bragg grating is located near the second facet to receive output light from the laser diode. The fiber Bragg grating has a very narrow linewidth about a selected wavelength and reflects output light in the selected narrow linewidth back into the laser diode through its second facet. The output light emitted from the first facet has a very narrow linewidth about the selected linewidth.
摘要:
A frequency tunable, athermal, laser diode source assembly, having a collimating lens coupled via a thermally compensating apparatus to a laser diode, the lens and diode mounted in a temperature compensating structure. A temperature controller controls the operating temperature and frequency of the diode. The assembly is ruggedized for hostile environments.
摘要:
To provide a laser oscillator allowing the use of a plastic lens in a semiconductor laser module for a high-output laser oscillator while being unlikely to reduce the efficiency of coupling to an optical fiber even if a laser output changes. A laser oscillator comprises a semiconductor laser module with multiple semiconductor laser elements. The laser oscillator comprises: multiple lenses in a first group provided in the semiconductor laser module for causing laser beams from the semiconductor laser elements to pass through; and a lens in a second group provided in the semiconductor laser module for causing all beams having passed through the multiple lenses in the first group to pass through. The lenses in the first group are plastic lenses. The lens in the second group is a glass lens.